Assembler

You can use the CALL Assembler macro to invoke ISPF services from Assembler routines as follows:

   CALL ISPLINK,(SERVICE, parameter-1,parameter-2,...),VL

   CALL ISPEXEC,(BUFLEN,BUFFER),VL

When using the CALL macro, you must use the VL keyword.

The return code from a call to ISPLINK or ISPEXEC is returned to the Assembler routine in register 15.

The example shown in Assembler example shows an Assembler routine that invokes the LMINIT and LMFREE services.